Request object encapsulates form data

 Public voiddoget (httpservletrequest request, httpservletresponse response) throws Servletexception, IOException {//test1 (request);//test2 (request);test3 (Request); }//get the value of a single control     Public voidtest1 (HttpServletRequest request) {String name= Request.getparameter ("username"); System. out. println ("name="+name); }    //gets the value of the control with the same name     Public voidtest2 (HttpServletRequest request) {string[] age= Request.getparametervalues (" Age");  for(Stringstring: Age) {System. out. println ("string="+string); }    }    //Get all Controls     Public voidtest3 (HttpServletRequest request) {//get the name of all controlsSystem. out. println ("--------Request--------"+request.tostring ()); Enumeration<String> ENU =Request.getparameternames ();  while(Enu.hasmoreelements ()) {String name=enu.nextelement (); //There may be multiple duplicatesString[] values =request.getparametervalues (name);  for(String value:values) {System. out. println (name +"---"+value); }        }    }
Encapsulates all values in a form into a JavaBean

Request object encapsulates form data